Noisy System

Noisy System

Possible Source(s):
- Loose or damaged compressor drive belt

Action(s) to take:
- Adjust or renew

Possible Source(s):
- Loose compressor mountings

Action(s) to take:
- Check for damage, tighten to specification if OK

Possible Source(s):
- Compressor oil level low

Action(s) to take:
- Look for evidence of leakage and rectify as required

Possible Source(s):
- Compressor internal damage

Action(s) to take:
- Check for debris, renew compressor and receiver drier

Possible Source(s):
- Blower motor noise

Action(s) to take:
- Renew motor (assuming no fan interference)

Possible Source(s):
- Excessive refrigerant charge

Action(s) to take:
- Check for vibration or 'thumping' in high pressure line; may be witnessed by high pressure on both HIGH and LOW sides Recover/recharge

Possible Source(s):
- Low refrigerant charge

Action(s) to take:
- Check for 'hissing' at expansion valve; may be witnessed by low HIGH side pressure. Recover/recharge

Possible Source(s):
- Moisture or air in the system

Action(s) to take:
- Check system pressures

Possible Source(s):
- Heater circuit air-lock

Action(s) to take:
- Perform Cooling System fill/bleed procedure.

Possible Source(s):
- Suction pipe touching bank 1(A) cylinder head (rubber isolator missing)

Action(s) to take:
- Check the pipe cluster for correct fitting